The LC66558A is a 4‑bit microcontroller with built‑in ROM, RAM, I/O ports, a serial interface, comparator and timers. It operates from a 5 V supply and is offered in 64‑pin DIP and QIP packages. The document details its features, pin layout, package dimensions and electrical characteristics.
Technical sections cover pin assignments, block diagram, detailed pin descriptions, absolute maximum ratings, recommended operating conditions, timing characteristics and the full instruction set for programming the device.
| Supply voltage range | ~0.3 to 7.0 V |
|---|---|
| Output voltage range | 0.3 to Von + 0.3 V |
| Operating temperature | -30 to 70 °C |
| Storage temperature range | -55 to 125 °C |
| Power dissipation (QIP64) | 430 mW |
The device operates from approximately 0.3 V up to 7.0 V.
The LC66558A can operate up to 70 °C.
It provides several 4‑bit multiplexed I/O ports, such as P2, P3, P4, P5, P6, P7, and additional ports PA, PB, PC, PD, and PE.